Abstract: A fixing device includes a first roller that is arranged in a region where an image formed on a recording medium is fixed to the recording medium and that heats the recording medium, a second roller that is arranged to face the first roller in the region and pressurizes the recording medium toward the first roller, a fan that sends air to the second roller, and a processor configured to control the fan, in which the second roller has a shape in which a diameter of an end portion in a longitudinal axis direction is larger than a diameter of a central portion in the longitudinal axis direction, the first roller and the second roller fix the image to the recording medium in the region, and the processor is configured to change a rotation speed of the fan between the central portion and the end portion of the second roller.

Abstract: A fixing device includes a fixing member that has an outer peripheral surface and an inner peripheral surface, is rotatably provided, comes into contact with, of a recording material on which an image is formed, a surface on which the image is formed, and fixes the image to the recording material, a rotating member that is rotatably provided and includes, at an outer peripheral portion, a contact surface coming into contact with the inner peripheral surface of the fixing member, and a removing member that is disposed to be in contact with the outer peripheral surface of the fixing member, is rotatably provided, and removes an attached object attached to the outer peripheral surface using a rotation speed difference with respect to the fixing member.

Abstract: A fixing device includes a first roller that is arranged in a region where an image formed on a recording medium is fixed to the recording medium and that heats the recording medium, a second roller that is arranged to face the first roller in the region and pressurizes the recording medium toward the first roller, a fan that sends air to the second roller, and a processor configured to control the fan, in which the second roller has a shape in which a diameter of an end portion in a longitudinal axis direction is larger than a diameter of a central portion in the longitudinal axis direction, the first roller and the second roller fix the image to the recording medium in the region, and the processor is configured to change a rotation speed of the fan between the central portion and the end portion of the second roller.

Abstract: A paper transport device includes a transport mechanism that transports paper to which an image is transferred to a fixing device while sucking the paper and a switching mechanism that switches between suction regions in a width direction of the transport mechanism, which corresponds to a width direction of the paper, according to a size of the paper.

Abstract: An image forming apparatus includes a fixing device and a controller. The fixing device includes a heating unit and a pressurizing unit. The heating unit is configured to come into contact with a recording medium, onto which an image is transferred and which is transported, so as to heat the recording medium while rotating. The pressurizing unit is configured to press the recording medium against the heating unit. The fixing device is configured to fix the image to the recording medium. The controller is configured to control switching between a first mode for fixing the image to the recording medium and a second mode for making a transport speed of a sheet member that passes through the fixing device slower than a peripheral speed of the heating unit.

Abstract: An image forming apparatus includes a fixing device and a controller. The fixing device includes a heating unit and a pressurizing unit. The heating unit is configured to come into contact with a recording medium, onto which an image is transferred and which is transported, so as to heat the recording medium while rotating. The pressurizing unit is configured to press the recording medium against the heating unit. The fixing device is configured to fix the image to the recording medium. The controller is configured to control switching between a first mode for fixing the image to the recording medium and a second mode for making a transport speed of a sheet member that passes through the fixing device slower than a peripheral speed of the heating unit.

Abstract: A fixing device includes a fixing unit that heats and fixes an unfixed image held on a recording medium onto the recording medium, a detector that is disposed at a position downstream from the fixing unit in a direction in which the recording medium is transported and that detects the recording medium by detecting thermal energy emitted by the recording medium, and a heating unit that heats the detector.

Abstract: A fixing device includes a fixing unit that heats and fixes an unfixed image held on a recording medium onto the recording medium, a detector that is disposed at a position downstream from the fixing unit in a direction in which the recording medium is transported and that detects the recording medium by detecting thermal energy emitted by the recording medium, and a heating unit that heats the detector.

Abstract: A fixing device includes a pair of fixing members disposed to face each other in a fixing area, a movable member movably supporting at least one of the fixing members between first and second positions, a driving device including a contact member and a drive source to move the movable member between the first and second positions, and a controller that controls the driving device, and if a temperature of the one of the fixing members is equal to or higher than a preset temperature when the driving device moves the movable member from the second position to the first position, changes the control to make driving force constantly exceed a rotational load of the driving device in accordance with advancement of a time of increase in the rotational load as compared with when the temperature of the one of the fixing members is lower than the preset temperature.

Abstract: An image forming apparatus includes a toner image forming unit that forms a toner image on a recording medium, a fixing unit that heats and fixes the toner image onto the recording medium, an ejection unit that ejects the recording medium through a curved transport path, a transport unit for two-sided printing that flips over the recording medium and transports the recording medium to the toner image forming unit, and a switching unit that switches, when an subsequent operation is specified to be performed on the recording medium, an ejection path through which the recording medium is to be ejected to an ejection path that passes the transport unit for two-sided printing and changes a temperature of the fixing unit to a temperature lower than a temperature at which the toner image is fixed to the recording medium or causes the fixing unit to stop heating.

Abstract: An image forming apparatus includes a toner image forming unit that forms a toner image on a recording medium, a fixing unit that heats and fixes the toner image onto the recording medium, an ejection unit that ejects the recording medium through a curved transport path, a transport unit for two-sided printing that flips over the recording medium and transports the recording medium to the toner image forming unit, and a switching unit that switches, when an subsequent operation is specified to be performed on the recording medium, an ejection path through which the recording medium is to be ejected to an ejection path that passes the transport unit for two-sided printing and changes a temperature of the fixing unit to a temperature lower than a temperature at which the toner image is fixed to the recording medium or causes the fixing unit to stop heating.

Abstract: A fixing device includes a magnetic field generator; a heating belt that heats toner on a transported sheet holding an unfixed toner image; a pressure roller that rotates while being pushed against an outer surface of the heating belt and that presses the sheet; a temperature-sensitive magnetic member that is disposed at an inner surface of the heating belt so as to oppose the magnetic field generator; a backing member that is disposed at the inner surface of the heating belt so as to oppose the pressure roller; and a supporting member that is disposed at an inner side of the heating belt, supports both end portions of the heating belt in a width direction, supports a back surface of the backing member, and supports the temperature-sensitive magnetic member.

Abstract: A fixing device includes a magnetic field generator; a heating belt that heats toner on a transported sheet holding an unfixed toner image; a pressure roller that rotates while being pushed against an outer surface of the heating belt and that presses the sheet; a temperature-sensitive magnetic member that is disposed at an inner surface of the heating belt so as to oppose the magnetic field generator; a backing member that is disposed at the inner surface of the heating belt so as to oppose the pressure roller; and a supporting member that is disposed at an inner side of the heating belt, supports both end portions of the heating belt in a width direction, supports a back surface of the backing member, and supports the temperature-sensitive magnetic member.

Abstract: A fixing device includes a fixing member that fixes toner on a recording material; a magnetic-field-producing unit including an exciting member that produces an alternating-current magnetic field, and first magnetic-circuit-producing members that each produce a magnetic circuit of the alternating-current magnetic field and are provided at a predetermined first interval and a second interval, smaller than the first interval, in a longitudinal direction of the fixing member; a temperature measuring device that measures the temperature of the fixing member; and a second magnetic-circuit-producing member having a cut portion in which the temperature measuring device is provided and that produces a magnetic circuit of the alternating-current magnetic field while conducting heat to the fixing member by being induction-heated.

Abstract: A heating device includes a magnetic-field generating unit that generates an alternating-current magnetic field, an endless belt, and a heat transfer unit that includes a heat storage layer, a thermosensitive layer, and a diffusion layer. The thermosensitive layer extends so as to separate the magnetic-field generating unit and the heat storage layer from each other, and forms a magnetic path that allows a magnetic flux of the alternating-current magnetic field to pass therethrough in a direction in which the thermosensitive layer extends at a temperature below a Curie temperature and a magnetic path that allows the magnetic flux to extend therethrough and reach the heat storage layer at a temperature higher than or equal to the Curie temperature. The diffusion layer has a higher thermal conductivity than thermal conductivities of the thermosensitive layer and the heat storage layer, and diffusing heat of the belt.

Abstract: A fixing device includes a fixing member that fixes toner on a recording material; a magnetic-field-producing unit including an exciting member that produces an alternating-current magnetic field, and first magnetic-circuit-producing members that each produce a magnetic circuit of the alternating-current magnetic field and are provided at a predetermined first interval and a second interval, smaller than the first interval, in a scanning direction; a temperature measuring device that measures the temperature of the fixing member; and a second magnetic-circuit-producing member having a cut portion in which the temperature measuring device is provided and that produces a magnetic circuit of the alternating-current magnetic field while conducting heat to the fixing member by being induction-heated. The first magnetic-circuit-producing members at the second interval are provided on both sides of a position corresponding to the cut portion in a direction in which the magnetic circuit is produced.

Abstract: An image forming apparatus includes an image forming unit; a fixing unit that heats a recording medium and fixes the image on the recording medium; a pressure member that is rotatable and has an outer peripheral surface, the pressure member moving from a position separated from the fixing unit to a position in contact with the fixing unit, the pressure member pressing the recording medium when the recording medium enters a contact section between the fixing unit and the outer peripheral surface; and a controller that controls transportation of the recording medium and a time at which a region of the outer peripheral surface reaches the contact section, the region contacting the fixing unit when the fixing unit contacts the outer peripheral surface and repeatedly reaching the contact section, so that the recording medium enters the contact section when the region reaches the contact section as the pressure member rotates.

Abstract: A heating device includes a magnetic-field generating unit that generates an alternating-current magnetic field, an endless belt, and a heat transfer unit that includes a heat storage layer, a thermosensitive layer, and a diffusion layer. The thermosensitive layer extends so as to separate the magnetic-field generating unit and the heat storage layer from each other, and forms a magnetic path that allows a magnetic flux of the alternating-current magnetic field to pass therethrough in a direction in which the thermosensitive layer extends at a temperature below a Curie temperature and a magnetic path that allows the magnetic flux to extend therethrough and reach the heat storage layer at a temperature higher than or equal to the Curie temperature. The diffusion layer has a higher thermal conductivity than thermal conductivities of the thermosensitive layer and the heat storage layer, and diffusing heat of the belt.

Abstract: The fixing device includes: a fixing member including a conductive layer capable of self-heating by electromagnetic induction; a drive unit rotationally driving the fixing member; a magnetic field generating member generating an alternate-current magnetic field intersecting with the conductive layer; a fixation pressing member movable so as to come into pressure contact with an outer circumferential surface of the fixing member and to separate from the outer circumferential surface; and a temperature measurement unit that includes a temperature detector and a support portion, that measures temperature of the fixing member with the temperature detector which is pressed by the support portion to be brought into contact with an inner circumferential surface of the fixing member, and that holds a contact state between the temperature detector and the inner circumferential surface in every state where the fixing member is displaced in accordance with movement of the fixation pressing member.

Abstract: An image forming apparatus includes an image forming unit; a fixing unit that heats a recording medium and fixes the image on the recording medium; a pressure member that is rotatable and has an outer peripheral surface, the pressure member moving from a position separated from the fixing unit to a position in contact with the fixing unit, the pressure member pressing the recording medium when the recording medium enters a contact section between the fixing unit and the outer peripheral surface; and a controller that controls transportation of the recording medium and a time at which a region of the outer peripheral surface reaches the contact section, the region contacting the fixing unit when the fixing unit contacts the outer peripheral surface and repeatedly reaching the contact section, so that the recording medium enters the contact section when the region reaches the contact section as the pressure member rotates.